Thermostat.



G. GUGLEY.

V \THEBMOSTAT. APPLICATION FILED JULY 19, 1913.

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V APPLICATION FILED JULY 19, 19153 11, 1 1 1, 1 38. Patented Sept. 22, 19m,

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GEORGE CUGLEY, 0F SPRINGFIELD, OHIO, ASSIGNOR TO THE BUCKEYE INCUIBATOR COMPANY, OF SPRINGFIELD, OHIO,

A CORPORATION OF OHIO.

'IHERMOSTAT.

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Application filed July 19, 1913. Serial No. 779,960.

To all whom it may concern Be it known that I, GEORGE CUGLEY a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Thermostats, of whlch the following is a specification.

This invention relates to improvements in that class of thermostats which are more especially adapted for regulating the heat of incubators and brooders; particularly that type of thermostats which are conis a top plan .view 0 strueted of a series of nested channels constructed of two metals of different degrees of expansion and contraction.

The object of my invention is to so construct and arrange these channels as to secure the maximum movement by the expansion and contraction thereof in the minimum amount of spaceto a greater degree than has been heretofore accomplished.

A further object of my invention is to simplify and make more effective the operation of devices of this character.

In the accompanyin drawings,Figure 1 fa device embodying my lmprovements. Fig. 2 is an elevation of the front side thereof. Fig.3 is a bottom plan. Fig. 4 is a view of one of the ends. Fig. 5 is a view of the opposite end. Fig. 6 is a perspective view showing the device attached to a portion of the wall of the incubator. Fig. 7 is an enlarged section on the line 77 of Fig. 2. Fig. 8 is an en- .line 99 of Fig. 2.

larged section on the line 8-8 of Fig. 2. Fig. 9 is an enlarged sectional view on the Like parts are represented by similar characters of reference throughout, the several views.

In the said drawings, 1 representsan L-' shaped bracket which may be secured in any suitable manner to the wall of theincubator or other structure in connection with which the device is to be used; this bracket having upper and lower laterally-extending ears 2 and 3. 4 represents another L shaped bracket which is also secured in any suitable manner to the wall-of the incubator.

Secured to the ear 20f the braoketl and also to the laterally-projecting portion of,

the bracket 4, by rivets 7 8 and 9, are two nested channels 5 andG; a washer 10 being preferably inserted between the under side 16; washers 1-7 and 18 being inserted be v tween the respective channels and the heads of the rivets. The upper and lower channels 5 and 13 are constructed of metal with the minimum power of expansion and contraction, such as iron, while the intermediate channels 6 and 14 areconstructed of metal with the maximum amount of expansion and contraction, such as zinc. The channels 6 and 14 are bowed, placed back to back, and connected together near their central ortions by a rivet 19, washers 20 and 21 being inserted between the respective channels and the respective heads of the rivet.

' The sides of the upper channel 5 are continuous throughout their entire length. At the end of the channel 6 where it is connected with the bracket 4, the side walls thereof are cut away, the cut away portion terminat ing at a point coincident with the edge of the bracket. The side walls of the channel 14 at that end where it is secured solely to the channel 13 are also cut away as shown; the cut away portions terminating substantially at the inside'edges of the washers 17 and 18. .The side walls of the lower channel 18 at that end Where the channel is con-.

nected to the bracket 1 are cut awayas shown in Fig. 3, the cut away portions terminating at a point coincident with the edge of the ear 3.

The side walls of the channel 6' at points midway their length are provided with V shaped notches 22 and 22 The side walls of the channel 14 are provided with V- shaped'notches '23, 23, 24 and 24*. The notches are so arranged that the ones 22 and 22 will be between and 24*. The two channels 6 and 14 are also connected together by the rivet 19' at a point between the respective notches 22 and 22 and 24 and 24, with the respective sides of the washers 20 and 21 coinciding with the apexes of the respective notches, as shown best in dotted lines in Fig. 2.

the ones 23 and 24, 23,

The result of this construction is that as the inner channels 6 and 14 expand and contract, the free end of the channel 13 will be moved up and down, this free end being connected by a rod 25 with any suitable regulating device. The cut away portions of the respective channels ermits of this movement of the parts by orming in effect hinges for the channels, and the respective notches in the side walls of the channels also permit the said channels to buckle up under expansion. By reason of having the two notches in the channel 1a placed on each side of the single notch in the channel 16, it has been found that a greater movement'can be secured in a device of this character which occupies no more space than prior devices, so that a maximum amount of movement of the parts is secured in the minimum amount of space. a

Having thus described my invention, I claim:

1. In a thermostat, a series of four channel-shaped members, the intermediate members being more expansible than the outer members and being arranged back to back and connected together at or near their centers, one of said intermediate members having a pair of notches cut in each of its side walls, and the other of said intermediate members having a single notch out in each of its side walls intermediate the notches of the other members.

2. In a thermostat, four channel-shaped members arranged in pairs, the ends of the members of each pair being connected together, the intermediate members being placed back to back and connected together near their centers, one of said intermediate members having each of its side walls formed with a pair of notches and the other intermediate member having its side walls formed with a single notch arranged intermediate the notches of the other member, the point of connection between said intermediate members being arranged between the single notch and one of the double notches.

3. In a thermostat, a series of four channel-shaped members arrangedin pairs, the intermediate members being of more expansible material than the other, members, said intermediate members being oppositely bowed, placed back to back and connected together, one of said intermediate members having each of its side walls formed with a pair of notches and the other of said intermediate members having each of its side walls formed with a single notch intermediate the notches .of the other member.

4. In a thermostat, a series of four channel-shaped members arranged in pairs, the ends of the channels of each pair being connected together, the intermediate members being oppositely bowed and placed back to back so as to separate the ends of the members of each pair, each pair of members being connected at one end to a bracket to hold them permanently spaced apart, the opposite ends of the one of said pair of members being also connected to a second bracket and the opposite ends of the other pair of members being left free, the side walls of one of said intermediate members being formed with a pair of notches and the side walls of the other intermediate member being formed with a single notch intermediate the notches of the other member,

and means for connecting said intermediate members together at or near their centers between the single notch and one of the double notches.

5. In a thermostat, a series of four metallic channel-shaped -members arranged in two pairs, an upper pair and a lower pair; the intermediate members being of more expansible material than the other members and being oppositely bowed and placed back to back, a bracket to which one end of all of said members are connected, a second bracket to which the opposite ends of the upper pair of members are connected, the opposite ends of the other pair being connected to each other, and being otherwise free; the side walls of the bowed member of the upper .pair being cut away at the point of connection with said last-mentioned bracket; the side walls of the lower member being cut away at the point of connection with said first-mentioned bracket; the side walls of the lower bowed member being cut away at the point of connection with said lower member; the lower bowed member being formed with a pair of notches and the upper bowed member formed with a single notch arranged intermediate the notches of the lower bowed member; and means for connecting said bowed members together.

In testimony whereof, I have hereunto set my hand this 8rd day of July 1913.

GEORGE CUGLEY. 

